VIZIO M51ax-J6 vs JBL BAR 300 comparison definitely makes sense. Based on our rating, M51ax-J6 has a total rating of 5.4 out of 10 versus 8.4 for BAR 300. The competitors' control buttons are different: power, source, demo, volume down, volume up and power, volume down, volume up, respectively.
Both soundbars have active amplification type. A significant difference between the units in the number of channels, the VIZIO M51ax-J6 has 5.1 versus 5.0 for the JBL BAR 300. Competitors do not have a built-in subwoofer. Rivals have wireless connection to separate subwoofer. The VIZIO M51ax-J6 got our rating of 7 out of 10, and the JBL BAR 300 6 for its audio features and specs.
Spotify support is available on the BAR 300.
Only the JBL BAR 300 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Each soundbar has 1/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. Both soundbars have a USB connector. For connectivity, the M51ax-J6 received a rating of 8/10 versus 10/10, respectively.
App control is available for the BAR 300. A built-in microphone is present only on the BAR 300. Soundbars do not have Multi-room support.
Both devices have support for Dolby Atmos multichannel audio format. A surround technology DTS:X is supported only by the M51ax-J6. For multichannel surround VIZIO M51ax-J6 got a rating of 8, and JBL BAR 300 7 out of 10.